Colle System: Pterodactyl Variation
ECO A40 ยท Colle System
The Colle System: Pterodactyl Variation (A40) is a chess opening in the Colle System family, played by White. It arises after the moves 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+.
Moves: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+